The most complete and accurate source for both couple and many group figures is rueda.casino.
There are currently 250+ videos of the most common couple and group figures, ábaco, structures, etc. The site is created by Bernt Rygg and videos are taught by Cubans. Lists of calls are free … but the video subscription costs just $4 per month. New videos are posted every week. Some characteristics of group figures:
- numerous changes of partners
- movement along the circle
- movement into the center
- leaders and followers separating into groups
- Rueda breaking into smaller groups (usually 2-couple Pequeña)
videos available on vimeo via Google: